Compare Generators Side-by-Side
Select up to 4 generators to compare specs, power output, noise levels, runtime and more. Your compare URL is shareable.
- Sportsman GEN4000iOF
- Yamaha EF2800i
Quick charts
Each chart uses its own Y-axis scale (so numbers are comparable within a chart).
Running watts
W
Starting watts
W
Noise
dB
Runtime @50%
h
Running watts by fuel
Shows how output changes across gasoline/propane/natural gas (when available).
| Specification | Sportsman GEN4000iOF | Yamaha EF2800i |
|---|---|---|
| General | ||
| Product type | Generator | Generator |
| Fuel | Gasoline | Gasoline |
| Inverter | Yes | Yes |
| Parallel capable | Yes | No |
| RV ready | Yes | No |
| Running watts | Winner: Winner: 3500 W | 2500 W |
| Starting watts | Winner: Winner: 3850 W | 2800 W |
| Noise (lower limit) | Winner: Winner: 65 dB | Winner: Winner: 65 dB |
| Weight | 93 lbs | Winner: Winner: 68 lbs |
| Run time @50% load | Winner: Winner: 10 h | Not available |
| Run time @25% load | Not available | 14.7 h |
| Fuel tank | 4.5 gal | 2.6 gal |
| Fuel gauge | Yes | Yes |
| Approx. dimensions (L × W × H) | 23 x 17.5 x 20.3 | 19.2 x 15.6 x 16.7 |
| Electrical | ||
| Voltage (AC) | 120 | 120 |
| Voltage (DC) | 5 | 12 |
| GFCI outlets | No | Yes |
| Covered outlets | No | No |
| Automatic Voltage Regulation | Yes | Yes |
| THD | 5 % | 2.5 % |
| Engine | ||
| Engine | 223 cc OHV 4-stroke | Yamaha MZ175 OHV 4-stroke |
| Alternator | Not available | Not available |
| Starting system | Recoil | Recoil |
| Warranty | ||
| Warranty | 1 years | 3 years |
| Power by fuel | ||
| Gasoline | Not available | Not available |
| Running watts | 3500 W | 2500 W |
| Starting watts | 3850 W | 2800 W |
| Running amps (120V) | Not available | Not available |
| Running amps (240V) | Not available | Not available |
| Peak amps (120V) | Not available | Not available |
| Peak amps (240V) | Not available | Not available |
| Run time @50% load | 10 h | Not available |
| Run time @25% load | Not available | 14.7 h |
| Other | ||
| Data center | Not available | Not available |
| Indicators | true | true |
| Compliance | EPA | EPA |
| Security | Not available | Not available |
| Spark arrestor | Yes | Yes |
| Neutral | Not available | Not available |
| UPC | 27077805437 | 799530396645 |
| Core / High-priority specs | ||
| Running Watts (Gasoline) | 3500 | 2500 |
| Starting Watts (Gasoline) | 3850 | 2800 |
| Runtime @ 50% Load (Gasoline) | 10 | Not available |
| Runtime @ 25% Load (Gasoline) | Not available | 14.7 |
| AC Outlet Types | 1x Duplex 120V 20A (5-20R)1x 120V 30A (TT-30R) | 1x Duplex 120V 20A (5-20R) GFCI1x 120V 30A (L5-30R) |
| Electrical & power | ||
| Frequency | 60 | 60 |
| Engine & construction | ||
| Engine Type | 223 cc OHV 4-stroke | OHV 4-stroke |
| Engine Displacement | 223 | 171 |
| Engine Oil Type | SAE 10W30 | Not available |
| Runtime & fuel system | ||
| Runtime @ 25% Load (Gasoline) | Not available | 14.7 |
| Runtime @ 50% Load (Gasoline) | 10 | Not available |
| Safety & compliance | ||
| Overload Protection System | Low oil and overload protection | Not available |
| Low Oil Protection | Yes | Yes |
| Included equipment | ||
| Included Accessories | Tool kit | Not available |
| Additional specs | ||
| Summary | The Sportsman GEN4000iOF is a gasoline-powered inverter generator delivering 3,850 surge watts and 3,500 running watts, suitable for powering sensitive electronics with its clean sine wave output. | The Yamaha EF2800i is a lightweight and quiet inverter generator capable of powering a range of devices, from power tools to sensitive electronics, making it suitable for home backup, job sites, and on-the-go use. |
- Most PowerfulSportsman GEN4000iOF3500W running
- QuietestSportsman GEN4000iOF65 dB
- Longest RuntimeSportsman GEN4000iOF10h at 50% load
Where to buy
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Sportsman GEN4000iOF
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Yamaha EF2800i
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